How can we change feeble sound to loud sound?

Answer

Loudness of sound is directly proportional to its amplitude.

Feeble sound can be changed to loud sound but increasing its amplitude.

 

What is Supersonic Speed

Answer

When speed of an object is more than speed of sound,it is said to be travelling at supersonic speed

Example

Bullets, Jet Aircraft travel at supersonic speed

  1. Class 9
  2. Chapter 12 Class 9 - Sound

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CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 9 years and a teacher from the past 16 years. He teaches Spoken English, Written English, Grammar and Vocabulary at Englishtan.